Issues
Physics Update
Reference Frame
Letters
Search and Discovery
Balloon Measurements of the Cosmic Microwave Background Strongly Favor a Flat Cosmos
The power spectrum of the microwave background's tiny point‐to‐point temperature fluctuations is a superb probe of cosmic curvature.
An Atom is Trapped by the Field of Just One Photon
The field of a single photon can not only trap atoms but also signal its position.
Articles
Phase‐Sensitive X‐Ray Imaging
New approaches that can detect x‐ray phase shifts within soft tissues show promise for clinical and biological applications.
A Historical Perspective on Copenhagen
What was Werner Heisenberg trying to tell Niels Bohr during his visit to Copenhagen in 1941, and what did he want from Bohr?
The German Uranium Project
The Farm Hall tapes show that Werner Heisenberg did not know how to calculate the critical mass in 1945, indicating that he did not work on atomic bombs during the war.
Werner Heisenberg and Albert Einstein
Albert Einstein was the early model and inspiration for Heisenberg, but scientific conflicts and political stresses marred their relationship.
Meetings
Washington Reports
Astronomers Envision New Observing Instruments in Next Decade to Focus on Farthest Reaches
Physics Community
Books
In the Shadow of the Bomb: Bethe, Oppenheimer, and the Moral Responsibility of the Scientist
ENIAC: The Triumphs and Tragedies of the World's First Computer
New Products
We Hear That
Obituaries
